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1.we can save natural resources if we (use) solar energy

2.he'd have a lot of friends if he (not be) so selfish

3.if it doesn't rain soon,the crop (lose)

4.if these (not be) electricity,people (can't) use house hold appdiances

5.unless he (study) hard ,he will pass the final exam

6.if the sun(stop) shining ,what (happen) to our planet?

7.what you (wish)if a fairy (give) you three wishes?

8.if i (know) his telephone number,i'd give it to you

9.if i had a type writes i (type)it myself

10.he might get fat if he (stop)smoking

E4.

1) If I study, I _____ (pass) the exams.

2) If the sun _____ (shine), we will walk to the town.

3) If he _____ (have) a temperature, he will see the doctor.

4) If my friends come, I _____ (be) very happy.

5) If she earns a lot of money, she _____ (fly) to New York.

6) If we travel to London, we _____ (visit) the museums.

7) If you _____ (wear) sandals in the mountains, you will slip on the rocks.

8) If Rita forgets her homework, the teacher _____ (give) her a low mark.

9) If they go to the disco, they _____ (listen) to loud music.

10) If you _____ (wait) a minute, I will ask my parents.

1.If you...(study) hart,you will pass the written examination.

2.If the weather...(be)fine,we will go for a picnic.

3.he...(write)to you if he time.

4.They...(have)a lot of fun if they come there.

5.If she...(not hurry),she will miss the bus.

6.You would feel better if you(take)...a short rest.

7.What(happen)...if the moon disappeared?

8.If I...a bird,I would be a dove.

9.Ifwe flew,we(see)...the world from above easily.

10.Had I had a map .I...(not lose)way.

B. SUPPLY THE CORRECT FORM OF THE VERBS

PART 1

1. If I (to come) ____________ home earlier, I (to prepare) ______________ dinner.

2. If we (to live) ______________ in Rome, Francesco (to visit) ____________ us.

3. If Tim and Tom (to be) ___________ older, they (to play) ___________ in our hockey team.

4. If he (to be) ______________ my friend, I (to invite) _____________ him to my birthday party.

5. If Susan (to study) ________________ harder, she (to be) ______________ better at school.

6. If they (to have) ______________ enough money, they (to buy) ______________ a new car.

7. If you (to do) _____________ a paper round, you (to earn) _____________ a little extra money.

8. If Michael (to get) _____________ more pocket money, he (to ask) _____________ Doris out for dinner.

9. If we (to hurry) ___________, we (to catch) _____________ the bus.

10. If it (to rain) ______________, Nina (to take) ______________ an umbrella with her.

PART 2

1. He (come) _______ if you waited.

2. If you (ring) _______ the bell, the servant would come.

3. If it (not, rain) _______ a lot, the rice crop wouln’t grow.

4. If today (be) _______ Sunday, we wouldn’t have to work

5. You would have to stay in bed unless your health (improve) _______.

6. If I (not have) ________ a typewriter, I could type it myself.

7. What (you do) ________ if you got fat ?

8. They would not be paid unless they (do) _______________ their work well.

9. If I became very rich, I (build) _______________ a hospital for the poor.

10. If he (give) _______________ up smoking, as his doctor orders, he will be soon well again.

11. You would have to stay in bed unless your health (improve) _______________.

12. If I (have) ________________ a typewriter, I could type it myself.

13. You could make much progress if you (attend) ________________ class regularly.

14. If I (know) ________________ his telephone number, I would give it to you.

15. If he (study) ________________ harder, he can pass an exam.

PART 3

1. If I (have) ________________ a typewriter, I could type it myself.

2. You could make much progress if you (attend) ________________ class regularly.

3.If I (know) ________________ his telephone number, I would give it to you.

4. If you are kind to me, I (be) _______________ good to you.

5. He (come) _______________ if you waited.

6. If he (study) ________________ harder, he can pass an exam.

7. She may be late if she (not hurry) ________________.

8. What (you do) ________________ if you got fat?

9. f you (ring) _______________ the bell, the servant would come.

10. If it (not, rain) _______________ a lot, the rice crop wouldn’t grow.

CONDITIONAL SENTENCES
(1ST AND 2ND)
Supply the correct form of the verbs in brackets: PART A
1. If you keep going in the rain, you (catch) .................... a cold.
2. If you were a king, what you (do) ....................?
3. You would feel better if you (take) .................... a short rest.
4. If you are asked by your parents, you (tell) ................... the truth?
5. If she (be) .................... two years older, she (take) ................... part in the contest.
6. The table (collapse) ................... if you stand on it.
7. She will give him your regards if she (see) .................... him.
8. They (be) .................... angry if you didn’t inform them.
9. The teacher (not be) ................... disappointed if I weren’t be like this.
10. Your grade will be higher if you (study) ................................. harder.
11. You (be) ............................. healthier if you have a good diet.
12. What (happen) ............................. if the moon disappeared?
13. If cats had wings, they (be) ............................ able to fly.
14. If he (fail) ............................. the coming exam, his parents will be very sad.
15. If she (have) .......................... any difficulties, she will ask for your help.
16. He (look) ............................ better if he didn’t have his hair dyed.
17. Will we cancel our picnic if it (rain) ................................ tomorrow?
18. What would you do if you (be) .................... a millionaire?
19. He (fail) .................... again if he doesn’t study harder.
20. Life would be much better if there (be) ................... no war in the world.

CONDITIONAL SENTENCES
(1ST AND 2ND)
Supply the correct form of the verbs in brackets: PART A
1. If you keep going in the rain, you (catch) .................... a cold.
2. If you were a king, what you (do) ....................?
3. You would feel better if you (take) .................... a short rest.
4. If you are asked by your parents, you (tell) ................... the truth?
5. If she (be) .................... two years older, she (take) ................... part in the contest.
6. The table (collapse) ................... if you stand on it.
7. She will give him your regards if she (see) .................... him.
8. They (be) .................... angry if you didn’t inform them.
9. The teacher (not be) ................... disappointed if I weren’t be like this.
10. Your grade will be higher if you (study) ................................. harder.
11. You (be) ............................. healthier if you have a good diet.
12. What (happen) ............................. if the moon disappeared?
13. If cats had wings, they (be) ............................ able to fly.
14. If he (fail) ............................. the coming exam, his parents will be very sad.
15. If she (have) .......................... any difficulties, she will ask for your help.
16. He (look) ............................ better if he didn’t have his hair dyed.
17. Will we cancel our picnic if it (rain) ................................ tomorrow?
18. What would you do if you (be) .................... a millionaire?
19. He (fail) .................... again if he doesn’t study harder.
20. Life would be much better if there (be) ................... no war in the world.

1. If he (study) ________________  harder, he can pass an exam.

2. She may be late if she (not hurry) ________________.

3.If you study harder, you (pass) ________________  the exam.

4.If people really cared about the environment, they ( not dump )_ waste into the lake.

5.If there was no fresh water in the world, what (happen) ________________.

6.If you (be)___________ the president, what would you do to help the environment ?

7.They get sick so often.If they exercised more, they (be) ____________ healthier.

8.If I (have) __________ one million US dollars, I would build more parks in our city.

9. Four countries ______________ (visit) by John so far.

10. London ______________ (have) a population of eight million people.

11. Vietnam’s Independence Day ________________ (celebrate) on September 09^th.

12. We ______________ (visit) Sydney Opera House for several times.

13. Some activities ______________ (prepare) to celebrate the lunar new year now.

14. When I came to the stadium, the match (start) _____________________

15. Before she (listen) _____________ to music, she (do)_____________ homework.

16. Last night, Peter (go)______ to the supermarket before he (go) __________ home.

17. Most students (leave) _____________ before the volcano (erupt) __________.

18. I (find) ____________ my pen after I (buy)_____________________ a new one.

19. Food and medical supplies (deliver)…………………….yesterday afternoon.

20. In the future, natural disasters (predict)… accurately with the help of  technology.

21.Three cats (rescue) ………………………….by the volunteers last Sunday.

22. Two houses (build) ………………………….in the city every years.

23. Earth (hold)………………………. by the gravity of the sun and orbits around it

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